A service transformer has a secondary power rating of 11.1 kVA and 5.4 kW. What is the phase shift (in degrees) between voltage and current (theta) for this transformer? (Answer format [ _ _ . _ _ ])
Given Secondary power rating
P = 5.4 KW
S = 11.1 KVA
Phase shift between voltage and current ()
COS = P / S
COS = 5.4 k / 11.1 k
COS = 0.486
= Cos -1(0.486)
= 60.89
Phase shift between voltage and current for this transformer = 60.89 degrees
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